package com.yebxxx.server.mail;

import com.rabbitmq.client.Channel;
import com.yebxxx.server.pojo.Employee;
import com.yebxxx.server.pojo.MailConstance;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.amqp.support.AmqpHeaders;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.mail.MailProperties;
import org.springframework.data.redis.core.HashOperations;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.mail.javamail.MimeMessageHelper;
import org.springframework.messaging.Message;
import org.springframework.messaging.MessageHeaders;
import org.springframework.stereotype.Component;
import org.thymeleaf.TemplateEngine;
import org.thymeleaf.context.Context;

import javax.mail.MessagingException;
import javax.mail.internet.MimeMessage;
import java.io.IOException;
import java.util.Date;

@Component
public class mailReceiver {
    private static final Logger LOGGER= LoggerFactory.getLogger(mailReceiver.class);

    @Autowired
    private JavaMailSender javaMailSender;
    @Autowired
    private MailProperties mailProperties;
    /**
     *
     */
    @Autowired
    private TemplateEngine templateEngine;
    @Autowired
    private RedisTemplate redisTemplate;
    @RabbitListener(queues = MailConstance.MAIL_QUEUE_NAME)
   public  void handler(Message message, Channel channel){
       Employee employee=(Employee)message.getPayload();
        MessageHeaders headers=message.getHeaders();
        long tag= (long)headers.get(AmqpHeaders.DELIVERY_TAG);//消息序号
        String msgId=(String)headers.get("spring_returned_message_correlation");
        HashOperations hashOperations = redisTemplate.opsForHash();
//        MimeMessage msg = javaMailSender.createMimeMessage();
//        MimeMessageHelper helper=new MimeMessageHelper(msg);
       try {
          if(hashOperations.entries("mail_log").containsKey(msgId)){
              LOGGER.error("消息已经被消费========>{}",msgId);
              /**
               * 手动确认消息
               *
               * tag：消息序号
               * multiple：是否确认多条
               */
              channel.basicAck(tag,false);
              return;
          }

           MimeMessage msg = javaMailSender.createMimeMessage();
           MimeMessageHelper helper=new MimeMessageHelper(msg);
          helper.setFrom(mailProperties.getUsername());
          helper.setTo(employee.getEmail());
          helper.setSubject("入职欢迎邮件");
          helper.setSentDate(new Date());
          Context context=new Context();
          context.setVariable("name",employee.getName());
          context.setVariable("posName",employee.getPosition().getName());
          context.setVariable("joblevelName",employee.getJoblevel().getName());
          context.setVariable("departmentName",employee.getDepartment().getName());
          String mail = templateEngine.process("mail", context);
          helper.setText(mail,true);
          javaMailSender.send(msg);
          LOGGER.info("邮件发送成功！");
          //将消息id存入redis
          hashOperations.put("mail_log",msgId,"OK");
          //手动确认消息
          channel.basicAck(tag,false);
       } catch (Exception e) {
           try {
               channel.basicNack(tag,false,true);
           } catch (IOException ioException) {
               LOGGER.error("邮件发送失败========={}",e.getMessage());
           }
           LOGGER.error("邮件发送失败========={}",e.getMessage());
       }
    }
}
